(Seattle, WA) -- Washington state political activist Tim Eyman is seeking to mount a challenge to city laws that mandate minimum wages above the state minimum wage. Eyman says he's gathering signatures for an initiative that would prohibit Washington cities from setting minimum wages above the state minimum of nine-32 an hour. If passed, the initiative would overturn recent minimum-wage increases to 15-dollars an hour in Seattle and SeaTac. Eyman says he'd like to get the initiative on the November 2015 statewide ballot.